EFFECT OF AGE OF SEEDLINGS, WEED MANAGEMENT PRACTICES AND HUMIC ACID APPLICATION ON SYSTEM OF RICE INTENSIFICATION

Abstract

A field experiment was carried out during kharif seasons of 2006 and 2007, to study the effect of age of seedlings, weed management practices and humic acid application on System of Rice Intensification. Transplanting 14 days old seedlings with pre emergence application of Pretilachlor at the rate of 0.75 kg ai/ha and one mechanical weeding at 30 DAT and humic acid application as seedling dip (0.3%) and foliar spray twice significantly reduced weed growth and improved growth parameters, yield attributes and yield of rice.

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Claims 2

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The combined transplanting, pretilachlor, mechanical weeding and humic acid treatment significantly reduced weed growth.

Taxon: riceOryza sativae0
Treatment: Transplanting 14 days old seedlings with pre emergence application of Pretilachlor at the rate of 0.75 kg ai/ha and one mechanical weeding at 30 DAT and humic acid application as seedling dip (0.3%) and foliar spray twicee0
Interactor: weede0weed
Outcome: weed growthe0
Direction: reducede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

*Oryza sativa* · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0
“Transplanting 14 days old seedlings with pre emergence application of Pretilachlor at the rate of 0.75 kg ai/ha and one mechanical weeding at 30 DAT and humic acid application as seedling dip (0.3%) and foliar spray twice significantly reduced weed growth and improved growth parameters, yield attributes and yield of rice.”
✓ located verbatim in the source · abstract, characters 204–527 · show in text ↑

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The combined treatment significantly improved rice growth parameters, yield attributes and yield.

Taxon: riceOryza sativae0
Treatment: Transplanting 14 days old seedlings with pre emergence application of Pretilachlor at the rate of 0.75 kg ai/ha and one mechanical weeding at 30 DAT and humic acid application as seedling dip (0.3%) and foliar spray twicee0
Outcome: growth parameters, yield attributes and yield of ricee0
Direction: improvede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim

e0
“Transplanting 14 days old seedlings with pre emergence application of Pretilachlor at the rate of 0.75 kg ai/ha and one mechanical weeding at 30 DAT and humic acid application as seedling dip (0.3%) and foliar spray twice significantly reduced weed growth and improved growth parameters, yield attributes and yield of rice.”
✓ located verbatim in the source · abstract, characters 204–527 · show in text ↑

Pretilachlor · yield · Oryza sativa (rice)Results differ

141 papers: 133 positive, 8 negative or no effect

132 papers in the same direction as this paper · 3 in the opposite direction · 5 reporting no difference from an alternative

negative
Pretilachlor and triclopyr at any dose could not yield at par with riceguard or anilofos plus triclopyr.
Effect of Herbicides on Weeds in Transplanted Rice · 2004 · compared with riceguard and anilofos+triclopyr
Opposite direction
negative
Pretilachlor caused phytotoxicity and reduced rice plant height and seed yield.
Rice Yield Variations as Affected by Direct Seeding and Herbicide Application · 2017
Opposite direction
no effect
Bensulfuron-methyl plus pretilachlor followed by bispyribac sodium gave grain yield of 5.39 t ha⁻¹, statistically on par with hand weeding.
Impact of Herbicide Combinations on Soil Microflora, Enzyme Activity, Nutrient Dynamics, and Weed Index in Dry Direct-Seeded Rice · 2025
Opposite direction

137 papers more in this group

See all 141 papers →

Pretilachlor · weed · Oryza sativa (rice)Results differ

150 papers: 147 positive, 3 negative or no effect

146 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative

negative
Pretilachlor did not effectively control weeds in dry seeding.
Integrated Management of Weeds in Direct-Seeded Rice in Cambodia · 2020
Opposite direction
negative
Bensulfuron-methyl plus pretilachlor at 60+600 g ha lowered weed number and dry weight at 45 DAT.
Efficacy of herbicides on weed management in wet season transplanted rice · 2015
Opposite direction
no effect
Pretilachlor at 500 g/ha alone gave results comparable to two rounds of hand weeding.
Optimization of Pretilachlor Dose for Weed Management in Transplanted Rice · 2002 · compared with two rounds of hand weeding
No difference from an alternative

146 papers more in this group

See all 150 papers →

application · weed · Oryza sativa (rice)Positive and negative results

27 papers: 26 positive, 1 negative or no effect

25 papers in the same direction as this paper · 1 in the opposite direction

no effect
The additional spray of fenoxaprop plus ethoxysulfuron had no effect on weed biomass at 42 days after planting.
Weed Growth and Grain Yield, as Affected by Herbicides, in Dry-seeded Rice in Sri Lanka · 2013
Opposite direction
positive
Weed infestation was lower with foliar nitrogen application in bed planting than with the conventional method.
Foliar Spray of Nitrogen Fertilizer on Raised Bed Increases Yield of Transplanted Aman Rice over Conventional Method · 2012 · compared with conventional method
Same direction
positive
A foliar spray of sorghum and sunflower water extract at 20 and 40 DAS was effective for weed control.
Effects of seeding time and weed control methods in direct seeded rice (Oryza sativa L.). · 2014
Same direction

23 papers more in this group

See all 27 papers →

transplanting · weed · Oryza sativa (rice)Positive and negative results

146 papers: 129 positive, 17 negative or no effect

128 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative

negative
Dry direct seeding had more weed infestation than continuous flooding and alternate wetting and drying.
WATER SAVING, WATER PRODUCTIVITY AND YIELD OUTPUTS OF FINE-GRAIN RICE CULTIVARS UNDER CONVENTIONAL AND WATER-SAVING RICE PRODUCTION SYSTEMS · 2015 · compared with TRCF and TRAWD
Opposite direction
negative
Weed population under dry broadcast seeding was five times that under transplanting.
Evaluation of planting methods in irrigated rice · 2004 · compared with TPR
Opposite direction
negative
Weed population at 30 days after sowing was significantly higher in direct seeded rice (24.3 per square metre) than in puddled transplanted rice (13.8).
On-farm assessment of direct-seeded rice production system under central Punjab conditions · 2014 · compared with PTR
Opposite direction

142 papers more in this group

See all 146 papers →

other · yield · Oryza sativa (rice)Positive and negative results

166 papers: 161 positive, 5 negative or no effect

160 papers in the same direction as this paper · 5 in the opposite direction

no effect
Humic acid levels did not significantly differ in grain weight.
Effect of Humic Acid on Growth and Yield Several Genotypes of Rice (Oryza Sativa L.) · 2021
Opposite direction
no effect
Zeolite soil amendment had no significant effect on the already high paddy yield.
Utilization of a small soda pulp and paper mill effluent for rice field irrigation · 1997
Opposite direction
no effect
Combined humic acid and silica had no significant effect on rice tiller number.
Effectiveness of Ameliorant Humic Acid and Silica Based on Availability of Sandy Soil Nitrogen for Rice · 2022
Opposite direction

162 papers more in this group

See all 166 papers →

herbicide · weed · Oryza sativa (rice)Positive and negative results

603 papers: 579 positive, 24 negative or no effect

578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative

negative
Rice flatsedge control by herbicides was lower with residue than without.
Interaction of Rice Residue and PRE Herbicides on Emergence and Biomass of Four Weed Species · 2012 · compared with absence of residue
Opposite direction
no effect
Imazosulfuron applied alone as preemergence did not control grassy weeds, broad leaved weeds or sedges in rice
Effect of tank-mixed herbicides on weeds and transplanted rice (Oryza sativa L.) · 2012
Opposite direction
negative
Oxyfluorfen failed to control other weeds beyond 15 days after sowing.
Stale Seedbed Technique for the Management of Sacciolepis interrupta in Semi-dry Rice · 2000
Opposite direction

599 papers more in this group

See all 603 papers →

application · yield · Oryza sativa (rice)Positive and negative results

691 papers: 645 positive, 46 negative or no effect

644 papers in the same direction as this paper · 37 in the opposite direction · 9 reporting no difference from an alternative

negative
Traditional soaking reduced kernel yield of direct seeded rice compared with control.
Enhancing the Performance of Direct Seeded Fine Rice by Seed Priming · 2006 · compared with control
Opposite direction
no effect
Foliar-applied Zn, I, Fe or Se did not affect rice grain yield.
Simultaneous Biofortification of Rice With Zinc, Iodine, Iron and Selenium Through Foliar Treatment of a Micronutrient Cocktail in Five Countries · 2020 · compared with local control (LC)
Opposite direction
no effect
Foliar silicon had no significant effect on plant height, harvest index or number of kernels of rice.
Effect of Foliar Application of Silicon on Yield and Quality of Rice (Oryza Sativa L) · 2013
Opposite direction

687 papers more in this group

See all 691 papers →

herbicide · yield · Oryza sativa (rice)Positive and negative results

802 papers: 725 positive, 77 negative or no effect

724 papers in the same direction as this paper · 57 in the opposite direction · 20 reporting no difference from an alternative

positive
Four cono weedings (10, 20, 30 and 40 DAT) gave better rice yields than two cono weedings.
Mechanized weed management to enhance productivity in System of Rice Intensification (SRI) · 2016 · compared with two times cono weeding
Same directionCites this paper
positive
Integrated butachlor, cono weeding, and hand weeding significantly raised rice yield attributes versus the weedy check and single practices.
Comparative Performance of Different Weed Management Practices in System of Rice Intensification · 2012 · compared with the weedy check, butachlor @ 1.5 kg a.i ha -1 alone and cono weeding thrice at 15 days interval alone practices
Same directionCites this paper
no effect
Weeding every 14 days did not increase rice grain yield.
Weeds in slash‐and‐burn rice fields in northern Laos · 1997
Opposite direction

798 papers more in this group

See all 802 papers →

8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.